Go Back   Pet forum for dogs cats and humans - Pets.ca > Discussion Groups - mainly cats and dogs > Cat health - Ask members * If your pet is vomiting-bleeding-diarrhea etc. Vet time!

Thread Tools Display Modes
Old June 28th, 2013, 02:52 AM
2catsandus 2catsandus is offline
Junior Member
Join Date: Jun 2013
Location: Taiwan
Posts: 7
Cranberry or N-Acetyl Glucosamine (Cystaid) for Cat's with Kidney Stones?

More frustration today as all the info I read and vets cannot agree... Our other cat has a kidney stone, and without an ultra sound we don't know what type of stone it is and what is causing it. We will have to wait until the vet buys one.

For many years she has been taking N-Acetyl Glucosamine either in pure form from Cystaid or a mix of this and other ingredients from Pet Naturals (which may not be good for cats with urinary tract stones). In addition we would like to try Cranberry powder, however, the information we read and hear is conflicting, with some saying good and some saying not good.. So what's the deal here? Anyone have some other information so we can be confused more?
Reply With Quote
Old September 13th, 2013, 09:26 PM
Dr Lee's Avatar
Dr Lee Dr Lee is offline
Senior Contributor - Expert
Join Date: Jun 2007
Location: East Coast
Posts: 1,060
There are quite a few types of stones/crystals that cats can form. Some are dissolvable and some are not. The most common type of dissolvable stone is struvite and the most common type of non-dissolvable stone is oxalate.

Placing a cat on a dissolution diet like Hill's s/d or c/d can quickly dissolve the stone. To create a state of dissolution, Hill's c/d utilizes controlled minerals, vitamin B6, potassium citrate while maintaining a low sodium diet. Additionally it has DHA from fish oil to help increase renal blood flow. There are other types of prescription dissolution diets but many of them like Royal Canin employs very high levels of salt to create dissolution. It is such a high level of salt, that it induces polyuria/polydipsia (increased urine production due to created of diluted urine). Many of the over the counter diets that say they are for cats with urinary issues often employ this high level of salt. High levels of salt can be damaging to cats if any level of kidney disease is present. If blood and urine tests show that the kidneys are normal, then these other diets can be utilized.

Urine testing to help determine likely stone type is ideal but it isn't always easy. Using a diet like Hill's c/d and repeating radiographs every 2-4 weeks to look for change in stone size can be helpful. If there is not change in size or they continue to increase, then calcium oxalate stone types may be more likely and a diet appropriate to that can be utilized. If the stones shrink, then struvite stones can be assumed and the diet can be used longer term. This plan could be discussed with your vet.

I realize that many commercial veterinary therapeutic diets are not always popular but diets like Hill's c/d have a lot of data and a track record of safety. For situations where we have a known medical issue, this can be a safe and effective method to address these types of issues. This may be a plan to run by your vet.

I hope this helps.
Christopher A. Lee, DVM, MPH, Diplomate ACVPM
Preventive Medicine Specialist With a Focus on Immunology and Infectious Disease
Reply With Quote

cranberry, cystaid, kidney stones, n-acetyl glucosamine

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Terms of Use

  • All Bulletin Board Posts are for personal/non-commercial use only.
  • Self-promotion and/or promotion in general is prohibited.
  • Debate is healthy but profane and deliberately rude posts will be deleted.
  • Posters not following the rules will be banned at the Admins' discretion.
  • Read the Full Forum Rules

Forum Details

  • Powered by vBulletin® Version 3.8.8
    Copyright ©2000 - 2020, vBulletin Solutions, Inc.
    vBulletin Optimisation by vB Optimise (Reduced on this page: MySQL 0%).
  • All times are GMT -5. The time now is 01:35 PM.